AOC e2350Sda Service Manual
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AOC e2350Sda Service Manual

AOC e2350Sda Service Manual

23" lcd monitor
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23" LCD Monitor
Service
Service
Service
Table of Contents....................................................1
Revision List...................................................................2
Important Safety Notice.................................................3
1.Monitor Specification...................................................4
2.LCD Monitor Description.........................................5
3.Operation Instruction.................................................6
3.1.General Instructions..................................................6
3.2.Control Buttons and Connections...............................6
3.3.OSD Setting.............................................................8
4.Input/Output Specification........................................24
4.1.Input Signal Connector..........................................24
4.2.Preset Display Modes................................25
4.3.Panel Specification...........................................26
5.Block Diagram............................................................29
5.1.Main Board.....................................................29
5.2.Power Board..................................................30
ANY PERSON ATTEMPTING TO SERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE
CHASSIS AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING
ELECTRONIC EQUIPMENT CONTAINING HIGH VOLTAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFOMER FOR THIS UNIT WHEN SERVICING

Table of Contents

Page Description
6.Schematic..........................................................31
6.1.Main Board.......................................................31
6.2.Power Board....................................................36
7.PCB Layout.........................................................38
7.1.Main Board......................................................38
7.2.Power Board.....................................................40
7.3.Key Board........................................................42
8.Maintainability.....................................................43
8.2.Trouble Shooting.............................................44
10.Mechanical Instructions ............... ..............50
11.Monitor Exploded View......................................58
12.BOM List......................................................59
SAFETY NOTICE
1
AOC e2350Sda
Horizontal Frequency
30 - 83kHz
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Summary of Contents for AOC e2350Sda

  • Page 1: Table Of Contents

    23" LCD Monitor AOC e2350Sda Service Service Service Horizontal Frequency 30 - 83kHz Table of Contents Description Page Description Page Table of Contents…………………..…………………..…...1 6.Schematic…………..….........31 Revision List.…...........……..2 6.1.Main Board..…….…...........31 Important Safety Notice.….…......……..3 6.2.Power Board..……….........36 1.Monitor Specification......………....4 7.PCB Layout..………..........38 2.LCD Monitor Description……….……………………..5 7.1.Main Board………..…........38...

  • Page 2: Revision List

    Revision List Version Release Date Revision History TPV Model Name Initial release TDBGN26BAGA1DNE Aug.-09-2011...

  • Page 3: Important Safety Notice

    Important Safety Notice Proper service and repair is important to the safe, reliable operation of all AOC Company Equipment. The service procedures recommended by AOC and described in this service manual are effective methods of performing service operations. Some of these service operations require the use of tools specially designed for the purpose. The special tools should be used when and as recommended.

  • Page 4: Monitor Specification

    1.Monitor Specifications...

  • Page 5: Lcd Monitor Description

    2.LCD Monitor Description The LCD monitor will contain a main board, an adapter board, a converter board and a key board which house the flat panel control logic, brightness control logic and DDC. The power part will provide AC to DC Inverter voltage to drive the backlight of panel and the main board chips each voltage.

  • Page 6: Operation Instruction

    3. Operating Instructions 3.1 General Instructions Press the power button to turn the monitor on or off. The other control knobs are located at front panel of the monitor (See Figure ). By changing these settings, the picture can be adjusted to your personal preferences. * The power cord should be connected.
  • Page 7 1. Power 2. Analog (DB-15 VGA cable) 3. DVI 4. Audio To protect equipment, always turn off the PC and LCD monitor before connecting. 1 Connect the power cable to the AC port on the back of the monitor. 2 Connect one end of the 15-pin D-Sub cable to the back of the monitor and connect the other end to the computer's D-Sub port.

  • Page 8: Osd Setting

    3.3 OSD Setting Basic and simple instruction on the control keys. 1) Press the MENU-button to activate the OSD window. 2) Press - or + to navigate through the functions. Once the desired function is highlighted, press the MENU-button to activate it. press - or + to navigate through the sub-menu functions. Once the desired function is highlighted, press MENU-button to activate it.
  • Page 9 Luminance Press (Menu) to display menu. Press to select (Luminance), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 10 Press two times to exit.
  • Page 11 Image Setup Press (Menu) to display menu. Press to select (Image Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 12 Press two times to exit.
  • Page 13 Color Setup Press (Menu) to display menu. Press to select (Color Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 14 Press two times to exit.

  • Page 15: Picture Boost

    Picture Boost Press (Menu) to display menu. Press to select (Picture Boost), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 16 Press two times to exit.
  • Page 17 OSD Setup Press (Menu) to display menu. Press to select (OSD Setup), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 18 Press two times to exit.
  • Page 19 Extra Press (Menu) to display menu. Press to select (Extra), and press to enter. Press to select submenu, and press to enter. Press to adjust.
  • Page 20 Press two times to exit.
  • Page 21 Exit Press (Menu) to display menu. Press to select (Exit), and press to enter. Press two times to exit...

  • Page 22: Led Indicators

    Orange or red e-Saver Welcome to use AOC e-Saver monitor power management software! The AOC e-Saver features Smart Shutdown functions for your monitors, allows your monitor to timely shutdown when PC unit is at any status (On, Off, Sleep or Screen Saver);...
  • Page 23 Screen+ Welcome to "Screen+" software by AOC, Screen+ software is a desktop screen splitting tool, it splits the desktop into different panes, each pane displays a different window. You only need to drag the window to a corresponding pane, when you want to access it.

  • Page 24: Input/Output Specification

    4. Input/Output Specification 4.1 Input Signal Connector Analog connector...

  • Page 25: Preset Display Modes

    4.2 Preset Display Modes...

  • Page 26: Panel Specification

    4.3 Panel Specification 4.3.1 General Features LM230WF5-TLD1 is a Color Active Matrix Liquid Crystal Display Light Emitting Diode ( White LED) backlight system without LED driver. The matrix employs a-Si Thin Film Transistor as the active element. It is a transmissive type display operating in the normally white mode.
  • Page 27 LED array electrical characteristics LED driver design guide: The design of the LED driver must have specifications for the LED in LCD Assembly. The performance of the LED in LCM, for example life time or brightness, is extremely influenced by the characteristics of the LED driver.
  • Page 28 4.3.4 Optical Characteristics 25°C =120mA =5.0V, f =60Hz =119MHz,...

  • Page 29: Block Diagram

    5. Block Diagram 5.1 Main Board 04.SCALER 02.INPUT VCC3.3 SOG_DET SOG_DET VCC1.8 05.PANEL INTERFACE EDID_WP AHS0 AHS0 AVS0 AVS0 AVS0 PA[0..9] DDCSDA1 DDCSDA1 DDCSDA1 PA[0..9] PA[0..9] DDCSCL1 DDCSCL1 DDCSCL1 VGA_CABLE_DET VGA_CABLE_DET VGA_CABLE_DET PB[0..9] 02.D-SUB INPUT PB[0..9] PB[0..9] EDID_WP EDID_WP P_SCL P_SCL VLCD P_SDA...

  • Page 30: Power Board

    5.2 Power Board AC input Transformer Rectifier Bridge 14.5 EMI filter (T901) diodes Rectifier and Filter Start Resistor (R908,R911) Feedback PWM Control Circuit Power Switch LD7576AGR (Q901) (U901) Photo coupler Regulator (U902) (IC903) L801 D801 14.5V C809 MOSFET (Q801) (CN805) PWM Control ON/OFF MP3389EF...

  • Page 31: Schematic

    6. Schematic 6.1 Main Board 715G4502M01000004C CN101 DET_VGA VGA_CABLE_DET R102 100R 1/16W 5% VGA_CABLE_DET 5 D-SUB 15P VGA_5V DDCSCL1 R101 DDCSCL_A DDCSCL1 100R 1/16W 5% VGA_5V VSIN0 BIN0- HSIN0 BIN0 R103 R104 R105 C102 GIN0- BIN0 ZD101 0R05 1/16W 0R05 1/16W 100R 1/16W 5% 47N16V B0+ 5...
  • Page 32 CN102 R127 DVI_CABLE_DET 5 JACK 100R 1/16W 5% DVI5V 3,5,7 VSY NC DET_DVI DVI5V SY NC GND SCL_DVI R128 100R 1/16W 5% D102 DDC SCL SDA_DVI R129 100R 1/16W 5% ESD_DVI BAV70 DDC SDA DVI5V R130 1K 1/16W 5% U104 ESD_DVI Q101 ESD_DVI...
  • Page 33 VCC1.8 U401 NT68660FG FB401 and FB402 is VCC1.8 7 PB[0..9] R402 NC/2K2 1/16W 5% PB[0..9] NC==>3.3V use TO252 type LVB3P FB401 R403 NC/2K2 1/16W 5% CVDD LVB3M 300OHM U401 NT68660UFG FB402 is NC==>3.3V LVBCKP LVBCKM VCC3.3 and 1.8V LDO use SOT-223 type LVB2P C401 C402...
  • Page 34 PA[0..9] PB[0..9] PA[0..9] PB[0..9] LVB3P CN408 LVA3P LVB3M CONN LVA3M LVBCKP LVB0M RXO0- LVACKP LVBCKM LVB0P RXO0+ LVACKM LVB2P LVB1M RXO1- LVA2P LVB2M LVB1P RXO1+ LVA2M LVB1P LVB2M RXO2- LVA1P LVB1M LVB2P RXO2+ LVA1M LVB0P LVA0P LVB0M LVBCKM RXOC- LVA0M LVBCKP RXOC+ LVB3M...
  • Page 35 VCC3.3 CN702 U701 AZ1117H-3.3TRG1 FB701 0 OHM +-5% 1/8W 3,4,5 VCC3.3 5 INPUT OUTPUT VCC3.3 ADJ/GND ON/OFF NC/CONN C701 R702 4K7 1/16W 5% 100N 16V +5V 3,4,5 CN701 R703 100R 1/16W 5% Adj_BACKLIGHT 5 C706 U702 VCC3.3 100N 16V C705 NC/G1117-33T43UF 100uF16V ON/OFF...

  • Page 36: Power Board

    6.2 Power Board Adapter 715G4744P01000001C R929 100 OHM 1/4W BD901 C916 C928 F801 KBP208G R930 100 OHM 1/4W 2N2 500V 2N2 500V 0R05 1/4W +14.5V R903 100 OHM 1/4W R904 ZD901 250OHM2W MTZJ T-72 16B 80GL22T-3 C918 NC/470UF/25V T901 D901 POWER X'FMR SR515 R905...
  • Page 37 Converter 715G4013P01002004S +12V D801 F801 L801 0R05 4A 1/4W 33uH C810 C809 0.47uF 50V 100uF 50V SK310B ON/OFF U801 C803 0.22uf 50V MP3389EF Q806 C807 Q801 CN801 VFAULT 4.7UF 100V Gate APM8005 R801 R805 GATE 300KOHM 1/10W COMP PGND C801 470N 25V C804 ISENSE 10 OHM 1% 1/4W...

  • Page 38: Pcb Layout

    7. PCB Layout 7.1 Main Board 715G4502M01000004C...

  • Page 40: Power Board

    7.2 Power Board Adapter 715G4744P01000001C...
  • Page 41 Converter 715G4013P01002004S...

  • Page 42: Key Board

    7.3 Key Board 715G4747K02000001C...

  • Page 43: Maintainability

    8. Maintainability 8.1 Equipments and Tools Requirement Voltmeter. Oscilloscope. Pattern Generator. DDC Tool with an IBM Compatible Computer. Alignment Tool. LCD Color Analyzer. Service Manual. User Manual.

  • Page 44: Trouble Shooting

    8.2 Trouble Shooting 1. No Power No power Check power cable is Re-plug the power cable tightened? Check Power “On/Off” Turn on the Power “On/Off” switch is “On”? Check the LED Check the AC power indicate is OK? Replace the converter board Replace main board and check connections Replace key board and check connections...
  • Page 45 2. No Video (Power LED Blue) No Video (Power LED Blue) Press the power Replace the main board button is OK? Replace the converter The end board Replace the main The end board and connection Replace the LVDS/FFC Check the LVDS/FFC cable or panel cable or panel Replace the key board...
  • Page 46 3. DIM DIM (image overlap, focus or flicker) Reset in factory mode The end Set to the optimal The end frequency, select the recommended frequency Readjust the phase and pixel The end clock in the user mode Pull out signal cable and Check the signal cable check “Self Test Feature and the PC...
  • Page 47 4. Color is not optimal Color is not optimal Color shift Miss color Reset the factory mode Replace the signal cable In the user mode, set the” color settings” until customer satisfy The end Pull out the signal cable and check the screen color display is normal? Replace the signal cable or PC Replace the main board...

  • Page 48: White-Balance,Luminance Adjustment

    9.White- Balance, Luminance Adjustment Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to setting MEM channel you can reference to chroma 7120 user guide or simple use “SC” key and “NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust .
  • Page 49 C. Adjust Cool (9300K) color-temperature 1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button) 2. Switch the MEM. Channel to Channel 9 (with up or down arrow on chroma 7120) 3. The LCD-indicator on chroma 7120 will show x=283±30，y=297±30 4.

  • Page 50: Mechanical Instructions

    10.Mechanical Instructions 1. Put the monitor on the EPE pad. 2. Lay down the monitor and the bottom side faces to Yourself.
  • Page 51 3. Pinch the hook and remove the base. 4. Use fixture to leave off the stand.
  • Page 52 5. Use fixture to remove the hinge cover. 6. Remove the screws of the stand.
  • Page 53 7. Remove the screws of the back cover. 8. Overturn the monitor and the top towards to yourself, and then take apart the front frame with hands.
  • Page 54 9. Prize up the front frame use fixture. 10. Overturn the monitor and take off the back cover.
  • Page 55 11. According to the different defective area to take off the KEPC, light line, LVDS, Hexagon screws, CBPC or PWPC to repair. （1）Remove the KEPC. （2）Pull the light line out.
  • Page 56 （3）Remove the Hexagon screws. （4）Remove the LVDS.
  • Page 57 （5）Overturn the iron plate and remove the screws, PWPC and CBPC.

  • Page 58: Monitor Exploded View

    11. Monitor Exploded Views...

  • Page 59: Bom List

    EPS-2350 H44GD014201 EPS-2350 H44GD014615 3A e2350Sda CARTON H45G 87 1 25 EPE COVER H52G1801 16006 insulating sheet H70G23C1615 2B e2350Sda CD MANUAL KEPCAHB5 KEY BOARD Q33G0504ABJ 1B0100 STAND TOP-2350 Q33G0505ABJ 1L0100 HINGE COVER-2350 Q34G7393ABJL4B0130 BEZEL Q34G7394ABJ 3B0100 REAR COVER 2350...
  • Page 60 SMTCB-U402 100GANGD003W11 MCU ASS'Y-056G2233 11 GND1 009G6005 1 GROUND TERMINAL CN602 033G3802 4B Y CONNECTOR 4P 2.0 U902 056G 139 3A PC123Y22FZOF SHARP U601 056G 616 85 AUDIO APA2603JI-TUG 3W DIP-16 NR901 061G 5810T RST NTCR 8 OHM +-20% 4A 13mm THINKING C908 063G107K474 6S 0.47UF +-10%...
  • Page 61 Q51G 6 4509 GLUE_RTV Q55G 100625 TIN STICK_LOW ARGENTUM U901 056G 379529 AC/DC CONVERTER IC LD7576AGR SOP-7 Q607 057G 417517 Tra LMBT3906LT1G -200mA/-40V SOT-23 LRC Q608 057G 417518 TRA LMBT3904LT1G 200mA/40V SOT-23 LRC R612 061G0603102 JT RST CHIP 1K 1/10W 5% TZAI YUAN R602 061G0603103 JT RST CHIP 10K 1/10W 5% TZAI YUAN...
  • Page 62 C621 065G060320131J CAP CHIP 0603 200PF J 50V NPO C620 065G060320131J CAP CHIP 0603 200PF J 50V NPO C619 065G060320131J CAP CHIP 0603 200PF J 50V NPO C618 065G060320131J CAP CHIP 0603 200PF J 50V NPO C617 065G060320131J CAP CHIP 0603 200PF J 50V NPO C610 065G060347131J CAP CHIP 0603 470P 50V NP0 +/-5%...
  • Page 63 Q706 057G 417518 TRA LMBT3904LT1G 200mA/40V SOT-23 LRC Q705 057G 763940 MOSFET AO3401A SOT-23 R711 061G0402000 JT RST CHIPR MAX0R05 1/16W TZAI YUAN R453 061G0402000 JT RST CHIPR MAX0R05 1/16W TZAI YUAN R410 061G0402000 JT RST CHIPR MAX0R05 1/16W TZAI YUAN R409 061G0402000 JT RST CHIPR MAX0R05 1/16W TZAI YUAN...
  • Page 64 R715 061G0402104 JT RST CHIP 100K 1/16W 5% TZAI YUAN R432 061G0402105 JT RST CHIP R 1Mohm 1/16W +/-5% TZAI YUAN R125 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R126 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN R411 061G0402222 JT RST CHIP 2K2 1/16W 5% TZAI YUAN...
  • Page 65 C118 065G040210412K CAP 0402 100NF 10% 16V X7R C119 065G040210412K CAP 0402 100NF 10% 16V X7R C402 065G040210412K CAP 0402 100NF 10% 16V X7R C403 065G040210412K CAP 0402 100NF 10% 16V X7R C415 065G040210412K CAP 0402 100NF 10% 16V X7R C412 065G040210412K CAP 0402 100NF 10% 16V X7R...
  • Page 66 IC903 056G 158 10 T LDO IC AZ431AZ-AE1 TO-92 150MA 40V TO-92 Q904 057G 530503 T 2SD1207T R915 061G 17222052T TZ RST CFR 22R 5% 1/4W R906 061G152M10452T SY RST MOFR 100KOHM +-5% 2WS FUTABA R904 061G152M25152T SY RST MOF 250R 5% 2W R924 061G152M47852T SY RST MOFR 0.47 OHM +-5% 2WS FUTABA...
  • Page 67 R839 061G06033308FF RST CHIP 3R3 1/10W 1% FENGHUA R809 061G06035101FT RST CHIP 5K1 1/10W 1% R803 061G06035102FT RST CHIP 51K 1/10W 1% R815 061G0805000 JT RST 0805 0.05R MAX 1/8W R841 061G0805000 JT RST 0805 0.05R MAX 1/8W R842 061G0805000 JT RST 0805 0.05R MAX 1/8W R843 061G0805000 JT...

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